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    thanks Bill. good thread, but i still have no...

    thanks Bill. good thread, but i still have no idea which approach to take...???
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    i'm in your boat too. paid $3.5k for the lathe...

    i'm in your boat too. paid $3.5k for the lathe but i knew it needed some restoration work.
    i don't mind paying to have things done and also doing what i am capable of completing myself. (already did...
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    i have a cnc mill, not a lathe...

    i have a cnc mill, not a lathe...
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    yes it is a hobby machine and yes there is wear...

    yes it is a hobby machine and yes there is wear everywhere (hey, it is a 60-year old lathe).
    but, if i could get a new spindle, or make new one rough and have it ground, or get it chromed and have...
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    sounds expensive

    sounds expensive
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    i don't have a big enough grinder or know someone...

    i don't have a big enough grinder or know someone who does to make one...
    i can grind small shafts within a few tenths on my surface grinder, but the tailstock shaft is too long.
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    do have any recommendations for a shop that does...

    do have any recommendations for a shop that does this work?
    i have called several grind shop and machine tool rebuilders and have not had any luck. they are either too busy, this is too small of a...
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    i just purchase a reamer. thanks for your offer....

    i just purchase a reamer. thanks for your offer.
    i talked to Steve at Monarch and regrinding the taper is not recommended/possible. he says the tang stop is in the way and will not operate properly...
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    Anyone Re-Grind the Tailstock Taper

    My 10ee tailstock taper is pretty bad. i was thinking of buying a reamer to clean it up, but thinking it might be worth just having it reground. Anyone do this and can recommend a small shop willing...
  10. i set the max speed at 90Hz and all seems fine. i...

    i set the max speed at 90Hz and all seems fine. i did up size with the new motor a little (from 1-1/2 hp to hp 2) so i'm guessing that higher speeds with small end mills will work out ok even if some...
  11. Bill, by the time i determined the motor was bad,...

    Bill, by the time i determined the motor was bad, i was set on getting a new style inverter duty motor. it just didn't make sense based on cost as well as the benefits of a motor designed for VFD use...
  12. got it, thanks. i will go easy and try a little...

    got it, thanks. i will go easy and try a little extra Hz when needed, which is not too often. i would need about 80-90Hz to get 3300-3700 RPM at the spindle which is adequate.
    i just rebuilt the...
  13. thanks, this is a huge help. yes, vfd is a Teco...

    thanks, this is a huge help.
    yes, vfd is a Teco N3 and i have been running General Vector control and did run the auto tuning (A006=1). glad i got that correct :-)
    i did enter the motor placard...
  14. i am very frustrated that the motor shop made...

    i am very frustrated that the motor shop made this mistake. it sent me on a wild-goose-chase buying another VFD and wasting a lot of time and $$$ looking for problems in the wrong places.
  15. sorry about that. i posted the data sheet given...

    sorry about that. i posted the data sheet given to me by the distributer and did not realize it was wrong. i'm glad to hear the motor is the correct design for my application.

    question: should i...
  16. you know a lot more than me regarding motor...

    you know a lot more than me regarding motor design and application. i am relying on the info provided by the mfg and the distributor and this motor appears to be exactly what i want. here is the...
  17. i'm not a motor guy either, but VFDs ramp up/down...

    i'm not a motor guy either, but VFDs ramp up/down and may have harmonics that can damage insulation, cause eddy currents, etc. that can damage old style motor windings. i'm sure others can provide...
  18. Working Again

    FWIW, i got the new motor installed (after a little delay).
    it works awesome!!! i could not be happier and made the best decision.
    i cnc'ed a spacer plate and turned a longer shaft. it bolted...
  19. hey Bill, yes i do have a suspicion that the VFD...

    hey Bill, yes i do have a suspicion that the VFD did shorten the life if the motor. i do have the scope and could check out the motor, but not really sure what/how to test.

    here is the new motor....
  20. i appreciate your input and suggestions for...

    i appreciate your input and suggestions for troubleshooting the problem. i'm not going back to the motor shop and don't know of another good shop locally to try out. i also don't want to take the...
  21. ??? odd comment, but ok. gear box was just...

    ??? odd comment, but ok.
    gear box was just rebuilt and works great. both main drive and back gear as well as the lube pump. new belts installed, bearings, etc...
    the motor is bad and yes, the motor...
  22. no torque. it is pulling the amps but is so weak...

    no torque. it is pulling the amps but is so weak i can stop the spindle with my hands.
    i think the motor shop just check the amps and did not put a load on the motor???
    if they did it would have...
  23. PM Forum? same forum... different section. ...

    PM Forum?
    same forum... different section.
    fell free to move this post, i don't how to do that.
  24. the motor is bad. after a lot of testing i...

    the motor is bad. after a lot of testing i discovered the VFDs are good and the motor is bad.
    opposite from what the motor shop told me.
    that was the confusion, i assumed the motor was good when i...
  25. yeah, got it. but, which forum. there are a lot...

    yeah, got it. but, which forum. there are a lot of electrical forums.
    just thought this would be a good place because its a mill and plenty of users have decent electrical skills.
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